JPS58193303A - Preparation of soft ferrous sintered parts - Google Patents

Preparation of soft ferrous sintered parts

Info

Publication number
JPS58193303A
JPS58193303A JP7702282A JP7702282A JPS58193303A JP S58193303 A JPS58193303 A JP S58193303A JP 7702282 A JP7702282 A JP 7702282A JP 7702282 A JP7702282 A JP 7702282A JP S58193303 A JPS58193303 A JP S58193303A
Authority
JP
Japan
Prior art keywords
ferrous sintered
less
soft ferrous
sintered material
subjected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP7702282A
Other languages
Japanese (ja)
Other versions
JPS6221841B2 (en
Inventor
Aoi Sugimoto
杉本　葵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Industries Ltd filed Critical Sumitomo Electric Industries Ltd
Priority to JP7702282A priority Critical patent/JPS58193303A/en
Publication of JPS58193303A publication Critical patent/JPS58193303A/en
Publication of JPS6221841B2 publication Critical patent/JPS6221841B2/ja
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only

Abstract

PURPOSE:To prepare soft ferrous sintered parts high in processing preciseness, by a method wherein heat treatment is applied to a soft ferrous sintered material in steam to form a film comprising iron oxide in the void thereof and the treated sintered material is subjected to cutting processing. CONSTITUTION:A soft ferrous sintered material containing about 1% or less P, about 0.3% or less C and about 2% or less Cu and having density of about 6.4-7.5g/cm<3> is subjected to heat treatment in steam to form a film comprising iron oxide such as Fe2O3 in the void thereof. By this treatment, the obtained soft ferrous sintered material is increased in rigidity without deteriorating cutting property thereof while becoming hardly torn off in cutting and becomes hardly distortional against external force and, therefore, it can be subjected to cutting processing in good preciseness to be formed into parts having thin wall parts.

Description

【発明の詳細な説明】 磁気特性を要する軟鉄系材料は、柔かさと同時にねばさ
を有するため、切削時にむしれを発生し難削で加工精度
を上げることが困難である。軟鉄系焼結材についても同
様で、特に薄肉材に対する精度のよい加工が困難である
。DETAILED DESCRIPTION OF THE INVENTION Soft iron-based materials that require magnetic properties are both soft and sticky, which causes peeling during cutting, making them difficult to cut and difficult to improve machining accuracy. The same applies to soft iron-based sintered materials, and it is particularly difficult to process thin-walled materials with high precision.

本発明は軟鉄系焼結材について、水蒸気中で加熱処理し
て空孔内にＦｅ　Ｏ等の酸化鉄の皮膜を形　　３ 成すると、被削性を悪化させず剛性を増し硬くなって切
削の際むしれにくくなるため、また外力に対し歪みにく
くなり薄肉部を有する部品等も精度よく加工できること
を見出したものである。The present invention proposes that when a soft iron-based sintered material is heat-treated in steam to form a film of iron oxide such as FeO in the pores, it increases rigidity without deteriorating machinability and becomes hard and difficult to cut. It has been discovered that parts with thin walls can be processed with high accuracy because they are less likely to peel off at the edges and are less likely to be distorted by external forces.

即ち本発明は、２１％以下、ｃｏ、３％以下、Ｏｕコ％
以下の密度６．グ〜７．！；ｇ／ｒｓの軟鉄系焼結部品
に水蒸気中で加熱処理を行なった後、切削加工を施すも
のである。That is, the present invention provides 21% or less, co, 3% or less, Ou co%
Density below 6. G~7. ! g/rs soft iron sintered parts are subjected to heat treatment in steam and then subjected to cutting.

次に実施例について説明する。Next, an example will be described.

外径３Ｑｖｓｍ、内径１１７ｍｍ、幅コ３關の密度ｇ　
、　ｓ　ｇ７ｂｍ３の焼結部品（組成：純鉄）を水蒸気
中で３！ｒＯｃに３０分加熱処理した後、内径１１ｇｍ
ｍに旋削加工仕上げした。寸法精度はｏ、ｏｙｍｍ以下
であった。Outer diameter 3Qvsm, inner diameter 117mm, density g of 3 widths
, s g7bm3 sintered parts (composition: pure iron) in steam 3! After heat treatment at rOc for 30 minutes, the inner diameter was 11gm.
Finished by turning to m. The dimensional accuracy was less than o.oymm.

、これに対し水蒸気加熱処理を行なわずに旋削仕上げ加
工を行なったものはＱ、／ｌｎｍ程度以下に精度を上げ
ることはできなかった。On the other hand, when finishing turning was performed without steam heat treatment, the accuracy could not be improved to below about Q,/lnm.

本発明法によれば、ＶＴＲ用マグネットケース、ステッ
プモーター用部品等を焼結材を用いて精度のよいものを
安価に提供でき乞。According to the method of the present invention, it is possible to provide magnetic cases for VTRs, parts for step motors, etc. with high precision at low cost using sintered materials.

Claims (2)

【特許請求の範囲】[Claims] （１）軟鉄系焼結部品に水蒸気中で加熱処理を施し空孔
内に酸化鉄の皮膜を生成せしめた後、切削加工すること
を特徴とする軟鉄系焼結部品の製造法。(1) A method for manufacturing a soft iron sintered part, which comprises heating the soft iron sintered part in steam to form an iron oxide film in the pores, and then cutting the soft iron sintered part. （２）軟鉄系焼結部品が薄肉部を有することを特徴とす
る特許請求の範囲（１１項記載の軟鉄系焼結部品の製造
法。(2) The method for manufacturing a soft iron sintered part according to claim 11, wherein the soft iron sintered part has a thin wall portion.
JP7702282A 1982-05-07 1982-05-07 Preparation of soft ferrous sintered parts Granted JPS58193303A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7702282A JPS58193303A (en) 1982-05-07 1982-05-07 Preparation of soft ferrous sintered parts

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7702282A JPS58193303A (en) 1982-05-07 1982-05-07 Preparation of soft ferrous sintered parts

Publications (2)

Publication Number Publication Date
JPS58193303A true JPS58193303A (en) 1983-11-11
JPS6221841B2 JPS6221841B2 (en) 1987-05-14

Family

ID=13622123

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7702282A Granted JPS58193303A (en) 1982-05-07 1982-05-07 Preparation of soft ferrous sintered parts

Country Status (1)

Country Link
JP (1) JPS58193303A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111435630A (en) * 2019-01-11 2020-07-21 丰田自动车株式会社 Method for producing soft magnetic material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50116305A (en) * 1974-02-26 1975-09-11
JPS5216681A (en) * 1975-07-29 1977-02-08 Matsushita Electric Works Ltd Trolley wires with elongated insulators
JPS53155507U (en) * 1978-03-28 1978-12-06
JPS5651504A (en) * 1979-09-29 1981-05-09 Toshiba Corp Production of sintered hydraulic parts

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50116305A (en) * 1974-02-26 1975-09-11
JPS5216681A (en) * 1975-07-29 1977-02-08 Matsushita Electric Works Ltd Trolley wires with elongated insulators
JPS53155507U (en) * 1978-03-28 1978-12-06
JPS5651504A (en) * 1979-09-29 1981-05-09 Toshiba Corp Production of sintered hydraulic parts

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111435630A (en) * 2019-01-11 2020-07-21 丰田自动车株式会社 Method for producing soft magnetic material
US11313022B2 (en) 2019-01-11 2022-04-26 Toyota Jidosha Kabushiki Kaisha Method for manufacturing soft magnetic member

Also Published As

Publication number Publication date
JPS6221841B2 (en) 1987-05-14

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